(n.) The concrete essence of the tonka bean, the fruit of Dipterix (formerly Coumarouna) odorata and consisting essentially of coumarin proper, which is a white crystalline substance, C9H6O2, of vanilla-like odor, regarded as an anhydride of coumaric acid, and used in flavoring. Coumarin in also made artificially.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Coumarin. Retrieved September 24, 2026, from http://smartdefine.org/coumarin/definitions/1992164 |
| Chicago | Webster's. 2011. "Coumarin" http://smartdefine.org/coumarin/definitions/1992164 (accessed September 24, 2026). |
| Harvard | Webster's 2011, Coumarin, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/coumarin/definitions/1992164>. |
| MLA | Webster's. "Coumarin" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/coumarin/definitions/1992164> |